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Planar Cassegrain Vortex Field Antenna Based on Metasurface

A metasurface and vortex field technology, applied to antennas, waveguide horns, electrical components, etc., can solve the problems of inaccurate phase adjustment, low antenna radiation efficiency, and large phase change gradients, achieving high-efficiency excitation, simple structure, and low cost effect

Active Publication Date: 2020-08-11
XIDIAN UNIV
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Problems solved by technology

However, the existing antennas based on single-mirror reflectors have low radiation efficiency, low gain, complex feed source configuration, and excessive phase change gradients that make it impossible to precisely control the phase. Gain vortex electromagnetic wave

Method used

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  • Planar Cassegrain Vortex Field Antenna Based on Metasurface
  • Planar Cassegrain Vortex Field Antenna Based on Metasurface
  • Planar Cassegrain Vortex Field Antenna Based on Metasurface

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] refer to figure 1 , the present invention includes a primary reflector 1 , a secondary reflector 2 , a feed source 3 , and a support structure 4 . The main reflector 1 adopts a planar square structure, the center of the main reflector 1 is hollowed out, and the feed source 3 is installed in the empty position of the building. The feed source 3 adopts a pyramidal horn antenna. The pyramidal horn antenna is divided into a waveguide part and an angle part. The waveguide part For standard WR51 waveguide. The value of the hollow area is determined by quantification, that is, the Cartesian coordinate system is established with the center of the upper surface of the main reflector 1 as the coordinate origin, the x-axis is parallel to one side of the main reflector 1, the y-axis is parallel to its adjacent side, and the x-axis It is perpendicu...

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Abstract

The invention discloses a metasurface-based plane cassegrain vortex field antenna, and mainly solves the problem that an existing vortex field antenna is high in phase compensation error, low in radiation gain and complex in structure. The metasurface-based plane cassegrain vortex field antenna comprises a main reflecting mirror (1), an auxiliary reflecting mirror (2), a feed source (3) and a supporting structure (4); the main and auxiliary reflecting mirrors and the feed source adopt a positive forward mode; the virtual focal point of the auxiliary reflecting mirror coincides with the focal point of the main reflecting mirror, and the solid focal point coincides with the phase center of the feed source; the auxiliary reflecting mirror adopts a phase change metasurface structure; the mainreflecting mirror adopts a plane structure; and the main reflecting mirror comprises a main dielectric layer (11), a main reflecting layer (12) and main phase regulating and controlling layers (13), wherein the main phase regulating and controlling layers are uniformly arranged, formed by a main metal ring microstructure (131) integrally distributed in a spiral shape and are used for generating vortex electromagnetic waves. By virtue of the metasurface-based plane cassegrain vortex field antenna, the vortex electromagnetic wave is efficiently excited, the antenna phase compensation error is reduced, the gain is increased, the structure is simplified, and the antenna can be used for communication and radar.

Description

technical field [0001] The invention belongs to the technical field of antennas, and relates to a planar Cassegrain vortex field antenna, which can be used for communication and radar. [0002] technical background [0003] In recent years, the demand for communication capacity has increased sharply, and vortex electromagnetic wave communication has become the focus of people's research because of its good orthogonality in different modes, which can form a large number of same-frequency multiplexing channels, and greatly improve spectrum utilization and communication capacity. . In vortex electromagnetic wave communication, how to efficiently excite vortex electromagnetic waves is the key link. A vortex field antenna with good orientation and high-quality helical phase distribution can realize long-distance transmission, identification and multiplexing of vortex electromagnetic waves. The microwave reflector antenna has a large gain and is suitable for the construction of a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q19/185H01Q15/14H01Q13/02
CPCH01Q13/02H01Q15/14H01Q19/185
Inventor 杨锐高鸣高东兴李冬张澳芳李佳成
Owner XIDIAN UNIV
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